EP0668113A1 - Appareil de nettoyage à haute pression - Google Patents

Appareil de nettoyage à haute pression Download PDF

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Publication number
EP0668113A1
EP0668113A1 EP95102047A EP95102047A EP0668113A1 EP 0668113 A1 EP0668113 A1 EP 0668113A1 EP 95102047 A EP95102047 A EP 95102047A EP 95102047 A EP95102047 A EP 95102047A EP 0668113 A1 EP0668113 A1 EP 0668113A1
Authority
EP
European Patent Office
Prior art keywords
pressure
line
check valve
valve
chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95102047A
Other languages
German (de)
English (en)
Inventor
Eberhard Veit
Josef Schneider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Priority to DE29521372U priority Critical patent/DE29521372U1/de
Publication of EP0668113A1 publication Critical patent/EP0668113A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/0205—Bypass pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/16—Opening or closing of a valve in a circuit

Definitions

  • the invention relates to a high-pressure cleaning device with a high-pressure pump for conveying a cleaning liquid, with a pressure line emanating from the high-pressure pump, at the end of which a closable nozzle head can be connected, with a shut-off valve in the pressure line, which is designed as a check valve, and with a bypass line which is closed when the nozzle head is closed branches upstream of the shut-off valve from the pressure line and leads to the suction line and which can be closed by means of an overflow valve depending on the flow rate of the cleaning liquid in the pressure line.
  • Such a high-pressure cleaning device is known from DE 32 48 622 C2.
  • a check valve in the pressure line also closes, so that the downstream region remains under high pressure.
  • this represents an ongoing material load on the spray lance, on the other hand, it is associated with a not insignificant danger for an operator.
  • a high-pressure cleaning device in which water is pressurized as cleaning liquid with the aid of a high-pressure pump and is supplied to a spray lance via a pressure line.
  • a spring-loaded check valve In the pressure line a spring-loaded check valve is arranged, which acts as a throttle point, so that when cleaning fluid flows, the pressure prevailing downstream of the check valve is lower than the pressure upstream of the check valve.
  • the spray lance is closed, the liquid flow is prevented, so that the throttling action of the check valve and the associated pressure drop are eliminated.
  • the pressure prevailing in the pressure line downstream of the check valve is the same as that present upstream of the check valve, and the closing body of the check valve is displaced into its closed position by the spring force.
  • DE 42 21 286 A1 discloses a device for automatically switching on and off a motor-pump unit for water purification machines.
  • a closable mouthpiece with a suitable nozzle can be connected to the end of a pressure line. If the mouthpiece is closed, the interruption of the flow of the cleaning liquid in the pressure line, as in the high-pressure cleaning device known from DE 30 28 746 C2, leads to a check valve arranged in the pressure line passing into a closed position, so that the closed mouthpiece is of high height Delivery pressure of the high pressure pump is exposed.
  • This device is therefore also associated with a source of danger for the operating personnel and with a high material load, in particular on the mouthpiece.
  • a certain relief of the part of the pressure line located downstream of the shut-off valve can be achieved with a high-pressure pump, as described in DE 35 30 954 A1.
  • the area of the pressure line located downstream of a check valve can be relieved via a relief valve if the pressure exceeds a certain absolute value.
  • This absolute value must be significantly above the maximum operating pressure, since otherwise the relief device would respond undesirably during operation.
  • a relief valve is in fact acted against the action of a spring by the liquid which is arranged in the part of the pressure line located downstream of the shut-off valve, and this liquid acts only against the force of this spring.
  • a relief element is located in a pressure line downstream of the check valve with the pressure line upstream pressure relief line connecting the check valve is used, which opens this when the pressure in the pressure line downstream of the check valve is a certain amount greater than the pressure in the pressure line upstream of the check valve.
  • the relief element opens the pressure relief line whenever the pressure difference between the downstream part of the pressure line and the upstream part of the pressure line exceeds a certain value.
  • This value can be significantly lower than the highest pressure value during operation, so that in this way, when the high-pressure cleaning device is switched off, a pressure in the part of the pressure line located downstream of the shut-off valve can be achieved, which is considerably below the maximum operating pressure, for example the residual pressure in are of the order of 60 bar, while the operating pressure is 120 bar and higher. This is achieved in that the relief device does not respond to an absolute pressure, but to a pressure difference.
  • the relief element thus reduces the pressure prevailing in the pressure line downstream of the check valve, which pressure acts on the closed nozzle head. This reduces the material load on the nozzle head and the associated risk of accidents, since the closed nozzle head is not exposed to the high delivery pressure of the high-pressure pump.
  • the relief element is designed as a spring-loaded check valve closing against the flow direction of the pressure relief line.
  • the check valve has a valve body designed as a ball, which is acted upon by a spring-loaded displacement body in the direction of the closed position of the check valve.
  • the overflow valve is controlled by an actuator which divides a control chamber into a high-pressure chamber and a low-pressure chamber, that the high-pressure chamber with the pressure line upstream of the check valve and the low-pressure chamber in the region of a throttle point with the pressure line downstream of the throttle point are connected, and that the pressure relief line leads from the low pressure chamber to the high pressure chamber and receives the relief element in this area.
  • the pressure relief line and the relief element arranged in it are thus assigned directly to the overflow valve of the bypass line, so that a very compact construction results.
  • the high-pressure pump comprises a control housing and a cylinder head, which lie against one another with their front sides, and that the relief element is arranged in the transition region between the cylinder head and the control housing.
  • the assembly of the relief element is particularly simple because it only has to be inserted between the two parts when the control housing and cylinder head are joined together.
  • control housing can be centered on the cylinder head with the aid of the relief element is particularly advantageous, since this simplifies the assembly of the control housing with the cylinder head.
  • the centering is achieved in a preferred embodiment in that the relief element is sealingly inserted into a recess in the front of the cylinder head and protrudes from the front, the projecting part being sealingly insertable in a corresponding recess in the control housing.
  • the relief element is thus designed in the form of a centering pin, so that the control housing can be centered on the cylinder head in a few simple steps.
  • the relief element inserted sealingly into the recesses serves as tolerance compensation between the control housing and the cylinder head.
  • FIG. 1 shows a high-pressure cleaning device with an electric motor 10, to which a high-pressure pump 12 connects, which carries a pump head 16 on its end face 14 facing away from the electric motor 10.
  • a high-pressure pump 12 connects, which carries a pump head 16 on its end face 14 facing away from the electric motor 10.
  • This is divided into a cylinder head 18 connected to the high pressure pump 12 and a control housing 20 which is connected to the front side 22 of the cylinder head 18 facing away from the high pressure pump 10.
  • a liquid supply line (not shown in the drawing) can be connected to the control housing 20.
  • the connection is made in a known manner with the help of an external thread 26 of the suction connection 24.
  • the control housing 20 also comprises a pressure connection 28, with the aid of which a high-pressure hose, also not shown in the drawing, can be connected to the control housing 20.
  • the pressure connection 28 also has an external thread.
  • the high-pressure pump 12 carries on its upper side for controlling the electric motor 10 a cuboid switch box 30 which is covered by a foot switch 32 for switching the electric motor 10 on and off.
  • the control box 30 is connected to the control housing 20 via an electrical plug connection 34, so that the electric motor 10 can be controlled not only depending on the position of the foot switch 32, but also depending on the position of an overflow valve described below within the control housing 20.
  • a cleaning liquid is supplied to the high-pressure pump 12 via the suction connection 24, said cleaning liquid being pressurized by the high-pressure pump 12 and being delivered to the high-pressure hose via the pressure connection 28.
  • the pumped cleaning liquid is then fed to a closable nozzle head via the high-pressure hose.
  • a chemical for example a cleaning agent concentrate
  • a storage container not shown in the drawing.
  • the strength of the feed i.e. H. the amount of the chemical admixed per unit of time of the conveyed cleaning liquid can be regulated manually with the aid of a regulating screw 36 protruding upwards from the control housing 20.
  • FIG. 2 The structure of the control housing 20 and the cylinder head 18 results from FIG. 2.
  • a suction line 40 which opens into a pump chamber 42, is formed by a bore 38, which is not connected to the liquid supply line.
  • the pump chamber 42 is delimited by a spring-loaded inlet valve 44 and a spring-loaded outlet valve 46.
  • a dash-dotted line shows a piston 48 which projects into the pump chamber 42 and is moved back and forth by the electric motor 10.
  • the pump chamber 42 On the pressure side, the pump chamber 42 is connected via a transverse bore 50 to a control chamber 52, from which in turn a pressure line 54 leads, which leads to the pressure connection 28, to which the high-pressure hose can be connected.
  • the control chamber 52 is divided into a high-pressure chamber 58 and a low-pressure chamber 60 by a control piston 56 which is displaceably mounted in it. While the high-pressure chamber 58 is connected on the one hand via the transverse bore 50 to the pump chamber 42 and on the other hand via the pressure line 54 to the pressure connection 28, the low-pressure chamber 60 is connected via a control line 62 and a suction chamber 64 to an injector 66 positioned in the pressure line 54.
  • the high-pressure chamber 58 is also connected via a bypass line 68 to the suction line 40 and opens into this upstream of the inlet valve 44.
  • a constriction 70 is provided in the bypass line in the region of its outlet from the high-pressure chamber 58, the edge of which is remote from the high-pressure chamber 58 as a valve seat 72 acts on which a valve body 74 can come to rest so that the bypass line 68 is closed.
  • the valve body 74 is connected via a rod 76 to the control piston 56 acting as an actuator.
  • a helical spring 78 surrounding the rod 76 displaces the control piston 56 in the control chamber 52 in a direction in which the valve body 74 comes into contact with the valve seat 72.
  • a spring-loaded check valve 80 Arranged between the control chamber 52 and the injector 66 in the pressure line 54 is a spring-loaded check valve 80 which closes against the flow direction of the pressure line 54.
  • the injector 66 has a constriction 82 of its flow cross-section and opens into the pressure connection 28.
  • a bore 84 opens into the injector 66, which creates a connection between the suction chamber 64 and the constriction 82 opposite side, the suction chamber 64 is connected via a conically widening inlet bore 86 and an obliquely adjoining oblique bore 88 to an inlet opening 90 designed as a blind hole, so that a chemical is supplied to the suction chamber 64 via the inlet opening 90, the oblique bore 88 and the inlet bore 86 become can, which can be admixed by the suction effect of the injector 66 to the cleaning liquid flowing through the pressure line 54.
  • an access bore 92 extending from the top of the control housing 20 and having an internal thread 94 into which the regulating screw 36 is screwed extends coaxially to the inlet bore 86.
  • the regulating screw 36 extends with a conically shaped pin 96 into the area of the likewise conically shaped inlet bore 86, so that it is either completely closed by the pin 96 depending on the position of the pin 96 and thus depending on the position of the regulating screw 36 or a narrow annular gap is formed between the pin 96 and the inlet bore 86, through which the chemical can be guided from the inlet opening 90 into the suction chamber 64.
  • the opening of the inlet bore 86 into the suction chamber 64 can be closed via a spring-loaded check valve 98 arranged in the suction chamber and closing against the direction of flow of the incoming chemical.
  • a plunger 100 extends through the low-pressure chamber 60 and extends through a control bore 102 and protrudes from the top of the control housing 20 adjacent to the regulating screw 36. With an end face 104 protruding from the control housing 20, the plunger 100 comes into contact with a microswitch 106 shown in dash-dotted lines in the drawing, which is arranged in the connector 34 also shown in dash-dotted lines in FIG.
  • the low pressure chamber 60 is connected to the high pressure chamber 58 via a relief bore 108.
  • the relief bore 108 extends to the front 22 of the cylinder head 18, then shows an arcuate course within the cylinder head 18, so that it then meets the front 22 a second time and is continued within the control housing 20 to the high-pressure chamber 58 .
  • the relief bore 108 is in each case substantially cylindrical, a centering sleeve 112 being inserted into the extension 110 adjacent to the low-pressure chamber 60, while the extension 114 adjacent to the high-pressure chamber 58 is essentially completely filled by a relief valve 116 .
  • the centering sleeve 112 and the relief valve 116 are each surrounded by two O-rings 118, through which they are tightly inserted into the extension 110 and 114 in the area of the control housing 20 and the cylinder head 18.
  • the centering sleeve 112 and the relief valve 116 act on the one hand as a centering aid between the control housing 20 and the cylinder head 18 and on the other hand in conjunction with the O-rings 118 surrounding them as tolerance compensation between the two components.
  • the relief valve 116 is designed as a spring-loaded check valve which closes against the flow direction of the relief bore 108 which runs from the low-pressure chamber 60 to the high-pressure chamber 58. It has a valve closure body 120 designed as a ball, to which the spring force of a valve spring 124 designed as a helical spring is applied via a displacement body 122. The force of the valve spring 124 pushes the valve closure body 120 into a closed position, in which it comes into contact with a valve seat 126 in such a way that the relief bore 108 is closed.
  • the valve seat 126 is formed by a conical widening of a valve bore 128 passing through the relief valve 116.
  • the pressure in the low-pressure chamber 60 is lower than in the high-pressure chamber 58, since the high-pressure chamber 58 is connected directly to the pressure-side outlet of the high-pressure pump, while the low-pressure chamber 60 is connected to the injector 66 via the control line 62 and the suction chamber 64 with a region of the pressure line 54 in which there is a low pressure, provided that Cleaning liquid flows through the injector 66.
  • the pressure difference between the low pressure chamber 60 and the high pressure chamber 58 together with the force of the coil spring 78 leads to the valve body 74 sealingly abutting the valve seat 72, so that the overflow valve in the bypass line 68 is closed.
  • the pressure difference in the control chamber 52 also has the result that the valve closure body 120 of the relief valve 116 lies sealingly on the valve seat 126, so that the relief bore 108 leading from the low-pressure chamber 60 to the high-pressure chamber 58 is also closed.
  • the nozzle head If the nozzle head is closed, the flow through the injector 66 is prevented, its throttling effect is eliminated and the pressure in the low-pressure chamber 60 corresponds essentially to the pressure in the high-pressure chamber 58.
  • the check valve 80 arranged in the pressure line goes into its due to the lack of pressure drop Closed position via.
  • the valve body 74 arranged in the bypass line 68 acts on the valve body 74 due to the prevailing pressure in the high-pressure chamber 58, so that this force opposes the valve body 74 Effect of the coil spring 78 is moved to the open position.
  • the liquid conveyed by the pump can flow back to the suction line 40 via the bypass line 68.
  • the flow resistance in the bypass line 68 is usually chosen to be low in order to keep losses in circulatory operation low, the pressure in the high-pressure chamber 58 also drops sharply.
  • the pressure in the low pressure chamber 60 is higher than the pressure in the high pressure chamber 58, with the result that the relief valve 116 opens.
  • the spring constant of the valve spring 124 of the relief valve 116 is selected so that in the circulatory operation no complete pressure equalization between the pressure prevailing in the low pressure chamber 60 and the pressure in the high pressure chamber 58 can take place, but that the relief valve 116 closes when a predetermined pressure in the low pressure chamber is reached , which is higher than the pressure prevailing in the high-pressure pump in the circuit operation.
  • a pressure difference is maintained in the control chamber 52, which results in a force acting on the control piston 56 from the low-pressure chamber 60 to the high-pressure chamber 58, so that the valve body 74 of the overflow valve arranged in the bypass line 68 remains stable in its open position.
  • the cleaning liquid can escape from the low-pressure chamber 60 via the control line 62 and the suction chamber 64 and the pressure in the low-pressure chamber 60 drops sharply.
  • the control piston 56 is displaced in the direction of the low-pressure chamber 60 and the bypass line 68 is closed. The work operation of the high pressure pump can thus be resumed.
  • control piston 56 controls the operation of the electric motor 10 of the high-pressure cleaning device via the plunger 100 which bears against the microswitch 106.
  • the microswitch 106 interrupts the power supply to the electric motor when the end face 104 of the plunger 100 lowers due to the movement of the control piston 56 during the transition from the working mode to the circulating mode.
  • Closing the nozzle head thus has the result that the bypass line 68 is opened and the pressure in the high-pressure chamber 58 drops as a result; at the same time, the pressure in the low-pressure chamber 60 and thus also in the pressure line 54 downstream of the check valve 80 is reduced via the relief bore 108 and the relief valve 116 and the electric motor 10 is switched off via the microswitch 106. If the nozzle head is opened again, the overflow valve arranged in the bypass line 68 closes and at the same time the electric motor 10 is switched on again due to the movement of the control piston 56, which is transmitted to the microswitch 106 via the plunger 100.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP95102047A 1994-02-16 1995-02-15 Appareil de nettoyage à haute pression Withdrawn EP0668113A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29521372U DE29521372U1 (de) 1994-02-16 1995-02-15 Hochdurckreinigungsgerät

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4404925 1994-02-16
DE4404925A DE4404925A1 (de) 1994-02-16 1994-02-16 Hochdruckreinigungsgerät

Publications (1)

Publication Number Publication Date
EP0668113A1 true EP0668113A1 (fr) 1995-08-23

Family

ID=6510395

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95102047A Withdrawn EP0668113A1 (fr) 1994-02-16 1995-02-15 Appareil de nettoyage à haute pression

Country Status (2)

Country Link
EP (1) EP0668113A1 (fr)
DE (2) DE4404925A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19617778C2 (de) * 1996-04-13 1998-12-17 Suttner Gmbh & Co Kg Ventilpistole für eine Hochdruckreinigungseinrichtung sowie Hochdruckreinigungseinrichtung mit einer solchen Ventilpistole
WO1999036700A1 (fr) * 1998-01-14 1999-07-22 Alfred Kärcher GmbH & Co. Pompe a piston pour appareil de nettoyage haute pression
EP0988897A3 (fr) * 1998-09-22 2004-12-08 Nordson Corporation Soupape autonettoyante de limitation de pression et de bypass, dispositif et procédé de distribution
DE102009049094A1 (de) * 2009-10-01 2011-04-07 Alfred Kärcher Gmbh & Co. Kg Pumpe für ein Hochdruckreinigungsgerät
US8439653B2 (en) 2009-10-01 2013-05-14 Alfred Kaercher Gmbh & Co. Kg Pump for a high-pressure cleaning apparatus
WO2013123969A1 (fr) * 2012-02-20 2013-08-29 Alfred Kärcher Gmbh & Co. Kg Pompe pour nettoyeur haute pression et nettoyeur haute pression
US8568109B2 (en) 2009-10-01 2013-10-29 Alfred Kaercher Gmbh & Co. Kg Pump for a high-pressure cleaning device
US8790092B2 (en) 2007-04-11 2014-07-29 Alfred Kaercher Gmbh & Co. Kg High-pressure cleaning appliance
CN110603109A (zh) * 2017-06-29 2019-12-20 阿尔弗雷德·卡赫欧洲两合公司 高压清洁设备
CN114130737A (zh) * 2021-11-12 2022-03-04 安徽日竞控制技术有限公司 一种便于切换清洗剂的清洗机

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4445520C1 (de) * 1994-12-20 1996-07-04 Kaercher Gmbh & Co Alfred Kolbenpumpe für ein Hochdruckreinigungsgerät
DK34695A (da) * 1995-03-30 1996-11-20 Kew Ind As Højtryksrenser med omløbsventil for pumpen
DE19838947C1 (de) * 1998-08-12 1999-11-25 Frank Arbeiter Bypassventilanordnung für ein Hochdruckreinigungsgerät sowie Hochdruckreinigungsgerät mit einer solchen Bypassventilanordnung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3810341A1 (de) * 1988-03-17 1989-09-28 Suttner Gmbh & Co Kg Fluessigkeitsfoerdereinrichtung, insbesondere hochdruckreinigungseinrichtung
DE3936155A1 (de) * 1989-10-31 1991-05-02 Kraenzle Josef Vorrichtung zur steuerung von pumpen fuer fluessigkeitsfoerderanlagen
DE4221286A1 (de) * 1991-07-05 1993-01-07 Annovi & Reverberi S P A Vorrichtung zur automatischen ein- und ausschaltung eines motor-pumpen-aggregats fuer wasserreinigungsmaschinen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3530954A1 (de) * 1985-08-29 1987-03-12 Oberdorfer G Wap Masch Hochdruck-reinigungsgeraet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3810341A1 (de) * 1988-03-17 1989-09-28 Suttner Gmbh & Co Kg Fluessigkeitsfoerdereinrichtung, insbesondere hochdruckreinigungseinrichtung
DE3936155A1 (de) * 1989-10-31 1991-05-02 Kraenzle Josef Vorrichtung zur steuerung von pumpen fuer fluessigkeitsfoerderanlagen
DE4221286A1 (de) * 1991-07-05 1993-01-07 Annovi & Reverberi S P A Vorrichtung zur automatischen ein- und ausschaltung eines motor-pumpen-aggregats fuer wasserreinigungsmaschinen

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19617778C2 (de) * 1996-04-13 1998-12-17 Suttner Gmbh & Co Kg Ventilpistole für eine Hochdruckreinigungseinrichtung sowie Hochdruckreinigungseinrichtung mit einer solchen Ventilpistole
WO1999036700A1 (fr) * 1998-01-14 1999-07-22 Alfred Kärcher GmbH & Co. Pompe a piston pour appareil de nettoyage haute pression
US6428291B1 (en) * 1998-01-14 2002-08-06 Alfred Kaercher Gmbh & Co. Reciprocating pump for a high pressure cleaning appliance
EP0988897A3 (fr) * 1998-09-22 2004-12-08 Nordson Corporation Soupape autonettoyante de limitation de pression et de bypass, dispositif et procédé de distribution
US8790092B2 (en) 2007-04-11 2014-07-29 Alfred Kaercher Gmbh & Co. Kg High-pressure cleaning appliance
US8439653B2 (en) 2009-10-01 2013-05-14 Alfred Kaercher Gmbh & Co. Kg Pump for a high-pressure cleaning apparatus
CN102686882A (zh) * 2009-10-01 2012-09-19 阿尔弗雷德·凯驰两合公司 用于高压清洁设备的泵
US8568109B2 (en) 2009-10-01 2013-10-29 Alfred Kaercher Gmbh & Co. Kg Pump for a high-pressure cleaning device
US8684699B2 (en) 2009-10-01 2014-04-01 Alfred Kaercher Gmbh & Co. Kg Pump for a high-pressure cleaning appliance
DE102009049094A1 (de) * 2009-10-01 2011-04-07 Alfred Kärcher Gmbh & Co. Kg Pumpe für ein Hochdruckreinigungsgerät
WO2013123969A1 (fr) * 2012-02-20 2013-08-29 Alfred Kärcher Gmbh & Co. Kg Pompe pour nettoyeur haute pression et nettoyeur haute pression
CN110603109A (zh) * 2017-06-29 2019-12-20 阿尔弗雷德·卡赫欧洲两合公司 高压清洁设备
CN114130737A (zh) * 2021-11-12 2022-03-04 安徽日竞控制技术有限公司 一种便于切换清洗剂的清洗机
CN114130737B (zh) * 2021-11-12 2022-09-13 安徽日竞控制技术有限公司 一种便于切换清洗剂的清洗机

Also Published As

Publication number Publication date
DE29500642U1 (de) 1995-03-09
DE4404925A1 (de) 1995-08-17

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